Valve mechanism.



T. A. BRYAN. VALVE MECHANISM.

(Application filed Apr. 1, 1895.)

Patented June 5, I900;

(No Model.)

. ammo/14,1201

I m w, 61m

UNITED STATES PATENT OFFICE.

THOMAS A. BRYAN, OF BALTIMORE, MARYLAND.

VAL VE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 651,230, dated'J'iine5, 1900.

Application filed April 1, 1895. Serial No. 544,080. (No model.)

To all whom it may concern.-

Be it known that I, THOMAS A. BRYAN,

. of Baltimore city, in the State of Maryland,

have invented certain new and useful Improvements in Valve Mechanism;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to an improvement in valves for the burners ofgas-stoves,

The invention consists in certain novel features of construction andcombinations and arrangements of parts, as hereinafterset forth, andpointed out in the claim.

The accompanying drawing represents a sectional view of avalve mechanismembodying myimprovements and showing the application of the same to aburner.

The casing of my improved valve mechanism comprises two arms A B,disposed at right angles to each other and each having a longitudinalbore, constituting a chamber,

which terminate, respectively, in valve-seats a b, with contractedoutlets a b, the walls of said valve-seats being made conical for theaccommodation of the pointed ends of needlevalves A B, which cooperatetherewith. The outer end of the arm A of the casing is provided with acap 0, havinga hole for the passage of the needle-valve A, and thelatteris provided with screw-threads o adapted to mesh with similarthreads a made in the bore of the arm A of the casing. The needlevalve Bis adapted to project beyond the lower end of the arm B of'the casingandin its lower end is made with a slot 11 for the reception of ascrew-driver or key. The valve B is also provided with screw-threads badapted to mesh with threads I) on a sleeve blet' projects for theattachment of the service-'pipe.

From the construction and arrangement of parts above described it willbe seen that the bore of the arm B communicates with the bore of the armA and that the main supply of gas will enter the bore of the arm Athrough the inlet h and then pass through the outlet a into the bore ofthe arm B, the admission of the gas to the bore of the arm B beingcontrolled by the valve A. From the bore or chamber of the arm B the gaswill pass through the outlet 19' to the burner; but the quantity andpressure of the gas as it passes through said outlet 6 will be regulatedby means of the valve B. The valve B can be set or adjusted for acertain pressure of gas to the burner and permitted to remain so set oradjusted indefinitely, the starting and stopping of the supply of gasbeing then controlled entirely by means of the valve A. The constantsupply of gas in the chamberB will tend to cause a steady exit of thegas from said chamber to the burner; but if this chamber were connecteddirectly with the main the fluctuations of pressurein the latter wouldbe transmitted through the chamber and cause unsteady feed of gas to theburner, resulting in the imperfect operation of the latter. To avoidsuch fluctuations of pressure in the main being transmitted through thechamber B and ultimately to the burner, I have provided the enlargedchamber A, which is connected directly with the main, and theaccumulated gas in this chamber flows directly into the chamber whichsupplies the burner through a contracted outlet.

Thus the fluctuations of pressure in the main are compensated for orabsorbed by the body of gas in the enlarged chamber A and the gas passesfrom said chamber through the contracted outlet at a into the chamber Bat or nearly at a uniform pressure. Any slight fluctuations, however, inpressure of the gas entering the chamber B will be compensated for bythe body of gas in the latter chamber and the uniformity of pressure ofgas as it passes to the burner will be insured. In other words, thechamber A, with its contracted outlet, serves as a compensatory meansfor effecting the absorption of fluctu ations of pressure in the main,and the chamber 13, with its contracted outlet, serves to preventfluctuations of pressure of gas as it passes to the point ofconsumption.

'My improvements are exceedingly simple in construction, are applicableto any gasburner, can be cheaply manufactured, and are effectual in allrespects in the performance of their functions.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a valve mechanism, the combination of a chamber having a contractedoutlet to supply gas therefrom toa burner, avalve to control the passageof gas through said outlet, an enlarged chamber having a contractedouting witnesses.

THOMAS A. BRYAN.

Witnesses:

E. J. GREEN, R. LEE SLADE.

